In 2015 there were 18.7 million families in the UK according to the latest statistics with the most common family type being married or civil partner couple family with or without dependent children at 12.5 million.
This trend has contributed to 7.7 million people in UK households who were living alone and Janet Morrison, Chief Executive of Independent Age, believes this raises questions about how the government provides care to the ageing population.
"These figures bring into focus the importance of the challenges and changes our society faces as our ageing society grows," she said.
"This sharp growth means we have to radically rethink how prepared we are to meet the future care and support needs of our ageing population. It raises questions about the role of the individual, family and State in planning for their care in later life.
"Meanwhile the figures show there are 3.5 million people aged 65 and over who live alone in the UK. While some welcome living alone, for many others the future could mean decades more of living by themselves, with the risk of a growing sense of loneliness and isolation."
To find out more about the statistics vist www.ons.co.uk